CN110458299A - Line-change of the monocyclic cable power distribution network mode of connection-abnormal discrimination method of table topology - Google Patents
Line-change of the monocyclic cable power distribution network mode of connection-abnormal discrimination method of table topology Download PDFInfo
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Abstract
A kind of line-change of the monocyclic cable power distribution network mode of connection-abnormal discrimination method of table topology, belongs to the line loss control field in Operation of Electric Systems.Its discrimination method includes: to carry out line loss per unit anomaly analysis to the route of mutual backup；The case where filtering out same the first and second table of user and same power distribution station 1 and No. 2 distribution transforming tables from the electricity of mutual backup route sale of electricity side, does exchange test；It is split for mutual backup line construction, and combined circuit line loss per unit situation and figure switch state, carries out electricity reduction test；Live investigation and defect elimination are carried out according to doubtful mistake.It is based on separated time line loss per unit calculation formula, for the monocyclic cable power distribution network mode of connection, analyzes the topological abnormal influence to line loss per unit, corresponding topological Exception Type has been refined, ensure that the objectivity of analysis, has improved scene investigation efficiency, before capable of verifying at the scene, abnormal cause is prejudged out.It can be widely used for the line loss monitoring field in Operation of Electric Systems.
Description
Technical field
The invention belongs in Operation of Electric Systems line loss control field more particularly to a kind of dicyclic cable power distribution network connect
Line-change of the line mode-abnormal discrimination method of table topology.
Background technique
Electricity and line loss per unit are power grid enterprises' core business indicators, are the most heavy of intuitive reflection power department income and cost
The data wanted, especially line loss per unit index comprehensive reflect the loss of each link in operation of power networks, concentrated reflection production, scheduling, battalion
The management level of every core business such as pin.
Line loss per unit is the important economic and technical index of one of Utilities Electric Co..The line loss per unit of 10kV separated time usually [-
It 1%, 6%] is considered reasonable in range.
In recent years, with the continuous improvement of electric energy meter coverage rate and the topological data level of informatization, guaranteeing for sale of electricity side
In the case that the metering electricity of use is all the same period, Guo Wang company carries out " subregion, partial pressure, separated time, Fen Tai comprehensively
The work of area " same period Controlling line loss.
Wherein the work of 10kV separated time line loss analyzing is an important content of Controlling line loss work, nets one mainly around state
Change electricity and line loss management system of local electric network come what is carried out, analyzed by the route unreasonable to line loss per unit, finds out line loss per unit exception
Reason, and defect elimination is administered in time.Have at present a small amount of document from the angle of management give line loss per unit anomaly analysis process and from
Reason strategy, but all lack quantitative analysis, be constructed without corresponding mathematical model and propose specific processing method.
When the same period statistical value of 10kV separated time line loss per unit calculates, electric power is derived from for sale of electricity side line-change-table topological relation
Production management system (Production Management System, PMS).But since synchronous abnormality, system defect, personnel dredge
The factors such as suddenly may cause the topological relation in PMS system and exist abnormal, not only influence the calculating of line loss per unit, be also relate to
The safety of on-site personnel.Consider that the sale of electricity side apparatus that part separated time is related to is more, abnormal conditions are complicated simultaneously, only by existing
Investigation is difficult, and also lacks the research in terms of line-change-table topology anomaly analysis at present.
Meanwhile it is a major reason for causing separated time line loss per unit statistical value as negative value that supply side metering is abnormal, it is contemplated that
It is more to measure abnormal cause, only investigation is difficult by scene.
In addition, 10kV power distribution network includes aerial net and cable system, as inner city overhead line enters the continuous depth of ground engineering
Enter, cable power distribution network accounting is higher and higher.In the cable power distribution network mode of connection, monocyclic and the twinshot mode of connection are two kinds
The basic mode of connection, is most widely used.
In actual operation, in order to improve scene investigation efficiency, there is an urgent need to one kind can measure abnormal front and back line loss per unit
Variation relation, and combined data analysis and failure anticipation, propose the abnormal discrimination method of metering, enable related personnel existing
Before the investigation of field, possible abnormal cause is analyzed, the accuracy of on-site verification is promoted.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of line-change-tables of monocyclic cable power distribution network mode of connection
Topological exception discrimination method.Its cable power distribution network mode of connection for being directed to monocyclic is based on separated time line loss per unit calculation formula, analysis
Influence of the topological exception to line loss per unit has found corresponding topological Exception Type；It is abnormal to propose a kind of line-change-table topology
Discrimination method.By deriving line loss per unit actual value and the relational expression of statistical value in the case of different Exception Types and being applied,
The objectivity that ensure that analysis result improves scene investigation efficiency and prejudges out abnormal cause before capable of verifying at the scene.
The technical scheme is that line-change-table the topology for providing a kind of monocyclic cable power distribution network mode of connection is abnormal
Discrimination method, it is characterized in that:
When carrying out the statistics and calculating of 10kV separated time progress line loss per unit in the work of daily power supply management, for monocyclic electricity
Cable power distribution network, for the 10kV separated time, is opened up when abnormal conditions occurs in the statistical value of separated time line loss per unit according to there is line-change-table
Abnormal conditions are flutterred to be recognized, and then really finds the 10kV separated time line loss per unit statistical value and the reason of abnormal conditions occurs；
Specifically, it is as follows to line-change-abnormal identification process of table topology:
Step 1: line loss per unit anomaly analysis being carried out to the route of mutual backup, if partial line route loss rate is unreasonable, simultaneously
The case where there are negative wire damages, but it is reasonable to be packaged with line loss per unit, then explanation may the separated time road line-change-table topology occur different
Chang Wenti goes to step 2；
Step 2: filtering out same the first and second table of user and same power distribution station 1 from the electricity of mutual backup route sale of electricity side
The case where with No. 2 distribution transforming tables, exchange test is done, if route line loss per unit is reasonable after reduction, then it represents that there may be change-table topology is wrong
Accidentally, it is stored in doubtful mistake set；
Step 3: being split for mutual backup line construction, and combined circuit line loss per unit situation and figure switch shape
State carries out electricity reduction test, if route line loss per unit is reasonable after the reduction of certain type of error, then it represents that there may be this mistakes
Accidentally, it is stored in doubtful mistake set；
Step 4: carrying out live investigation and defect elimination according to doubtful mistake.
Specifically, the monocyclic cable power distribution network is constituted by pressing bus to draw single back line in difference, wherein
Switch KnFor the outlet switch of corresponding line n, switch KmFor the outlet switch of corresponding line m, switch Kr2It is up mode
Under open loop point.
Further, the monocyclic cable power distribution network can be by Operation switch when any line fault, will
On load transfer to another route.
Further, the line-change-table topology abnormal conditions include at least:
1) change-table topology is abnormal；
2) wiring error；
3) scene and PMS figure switch state are inconsistent.
Exchange test described in it is carried out according to following calculate:
Wherein, βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter；W′P1With W 'P2
Respectively correspond the electricity of same No. 1 and No. 2 distribution transforming of power distribution station.
The calculation formula of its 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.
Compared with the prior art, the invention has the advantages that
1. the abnormal front and back line loss per unit variation relation formula of the topology that technical solution of the present invention is derived can intuitively reflect topology
The abnormal influence to every route line loss per unit, can be used for prejudging abnormal cause；
2. being directed to the monocyclic cable power distribution network mode of connection, corresponding topological Exception Type is refined, and derived difference
The relational expression of line loss per unit actual value and statistical value in the case of Exception Type, and then propose a kind of line-change-abnormal identification of table topology
Method；
3. line-the change proposed-abnormal discrimination method of table topology can effectively judge abnormal cause, with higher
Applicability.
Detailed description of the invention
Fig. 1 is the schematic diagram of the monocyclic mode of connection；
Fig. 2 is the supply district schematic diagram of the monocyclic mode of connection；
Fig. 3 is the grid structure schematic diagram of cable power distribution network in embodiment.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
When the same period statistical value of 10kV separated time line loss per unit calculates, PMS is derived from for sale of electricity side line-change-table topological relation
(Production Management System, power production management) system.But due to synchronous abnormality, system defect, personnel
There is exception, not only influence the calculating of line loss per unit, also relationship in the factors such as carelessness, the topological relation that may cause in PMS system
To the safety of on-site personnel.
Simultaneously, it is contemplated that the sale of electricity side apparatus that part separated time is related to is more, abnormal conditions are complicated, only by scene investigation difficulty
It is very big.
In addition, 10kV power distribution network includes aerial net and cable system, as inner city overhead line enters the continuous depth of ground engineering
Enter, cable power distribution network accounting is higher and higher.In the cable power distribution network mode of connection, monocyclic is a kind of basic mode of connection,
It is most widely used, it is therefore desirable to give primary study.
One, line-change-abnormal influence to line loss per unit of table topology:
The calculation formula of 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.For route n,
The public change of its sale of electricity side or special power transformation amount W ' originally belong to Wnj, but since exception occurs in PMS middle line-change-table topological relation, it leads
W ' is caused to be attributed to W in line loss per unit calculatingmj, i.e. in route m.The line loss per unit that will lead to route n in this way obviously increases, even
More than zone of reasonableness；And the line loss per unit of route m significantly reduces, it may appear that the case where negative wire is damaged.Above-mentioned phenomenon readily occurs in electricity
In cable power distribution network in the mode of connection of mutual backup.This situation occurs, it is necessary to carry out analysis and defect elimination.
Lower mask body analyzes line-change-table topology abnormal conditions that the monocyclic mode of connection is likely to occur.
In Fig. 1, the schematic diagram of the monocyclic mode of connection is given, is constituted by pressing bus to draw single back line in difference
, first switch KnWith second switch KmIt is the outlet switch of corresponding first line n and the second route m, switch K respectivelyr2It is just
Open loop point under the normal method of operation.
As seen from the figure, can be by Operation switch when any line fault, it will be on load transfer to another route.
For the monocyclic mode of connection, occur there are mainly two types of line-change-table topology abnormal conditions: one is wiring error,
That is route Lr1Mistake has been connected to switch Kr2, Lr2Mistake has been connected to Kr1；Another kind is that scene and PMS figure switch state are inconsistent,
Common type of error is as shown in table 1.
1 switch state type of error of table:
When wiring error and switch state type of error 1 occurs, the electricity W ' belonged to originally in route n will lead torBy mistake
It has been associated on route m, has caused the statistical value of route n and m line loss per unit are as follows:
In formula: β 'nWith β 'mThe respectively statistical value of route n and m line loss per unit；βnAnd βmRespectively route n and m line loss per unit
Actual value.
And then it follows that
Similarly, it can derive the relational expression of line loss per unit actual value and statistical value under other switch state type of errors, have
Body is as shown in table 2.
Line loss per unit under the different type of errors of table 2
Can be seen that type of error 1 and 2 to may cause route n line loss per unit by above-mentioned analysis is negative value isochrone road m line
Loss rate be larger positive value, type of error 3 and 4 may cause route m line loss per unit be negative value isochrone road n line loss per unit be it is larger just
Value.
Two, topological anomaly analysis:
For the monocyclic mode of connection, occur there are mainly three types of line-change-table topology abnormal conditions: 1) change-table topology is different
Often；2) wiring error；3) scene and PMS figure switch state are inconsistent.
(1) change-table topology is abnormal:
In Fig. 2, W 'r1With W 'r2In may include user, distribution transforming and other loads.
In Fig. 2, W 'A1With W 'A2Respectively correspond the first of same user and the electricity of second table, and the change of the two tables-table relationship
It is likely to be associated with anti-, i.e. W 'A1Party A-subscriber's second has been arrived by erroneous association, and W 'A2Party A-subscriber's first has been arrived by erroneous association, has caused line
The statistical value of road n and m line loss per unit are as follows:
And then it follows that
W′P1With W 'P2Respectively correspond the electricity of same No. 1 and No. 2 distribution transforming of power distribution station, and the change of the two tables-table relationship
Associated errors are likely to, can similarly derive influence of this problem to line loss per unit.
(2) wiring error:
The case where wiring error mainly occurs is: route Lr1Mistake has been connected to switch KIr2, Lr2Mistake has been connected to KIr1.This
Kind mistake causes the actual value of route n and m line loss per unit and the relational expression of statistical value are as follows:
(3) scene and PMS figure switch state are inconsistent:
The reason of causing live situation inconsistent with PMS figure switch state mainly has: autotomying protection act and schemes in scene
In shape or normal operating conditions are either to autotomy protection act state and scene is normal operating conditions on figure.Concrete kind
Type is as shown in table 3.
Switch state under the different type of errors of table 3
When above-mentioned switch state mistake occurs, the relational expression of line loss per unit actual value and statistical value can be derived, specifically such as
Shown in table 4.
Line loss per unit under the different type of errors of table 4
As can be seen from Table 4, it is negative value isochrone road m line loss per unit that type of error 2 and 3, which may cause route n line loss per unit,
For larger positive value, it be negative value isochrone road n line loss per unit is larger positive value that type of error 1 and 4, which may cause route m line loss per unit,.
Three, line-change-abnormal identification process of table topology:
Can be seen that main abnormal reason for the topological anomaly analysis under the monocyclic mode of connection includes: change-table topology
Mistake, wiring error, scene and PMS figure switch state are inconsistent.
So as follows to line-change-abnormal identification process of table topology in technical solution of the present invention:
Step 1: line loss per unit anomaly analysis being carried out to the route of mutual backup, if partial line route loss rate is unreasonable, simultaneously
The case where there are negative wire damages, but it is reasonable to be packaged with line loss per unit, then and explanation is likely to occur line-change-table topology abnormal problem, turns
Step 2.
Step 2: filtering out same the first and second table of user and same power distribution station 1 from the electricity of mutual backup route sale of electricity side
Situations such as with No. 2 distribution transforming tables, does exchange test according to formula (7), if route line loss per unit is reasonable after reduction, then it represents that there may be
Change-table Topology Error is stored in doubtful mistake set.
Step 3: being split for mutual backup line construction, and combined circuit line loss per unit situation and figure switch shape
State carries out electricity reduction test according to table 2 and table 4, if route line loss per unit is reasonable after the reduction of certain type of error, then it represents that may
There are this mistakes, are stored in doubtful mistake set.
Step 4: carrying out live investigation and defect elimination according to doubtful mistake.
Instance analysis:
It is standby each other to one group of certain power supply company in order to verify proposed line-change-table topology abnormal discrimination method validity
Route is analyzed.Wherein: all line losses per unit of totally 16 friendship ties switchyard first are -148.91%, totally 57 friendship ties switchyard second
All line losses per unit are 40.16%, and the corresponding specific component information difference in two lines road is as shown in table 5 and table 6.Through analyzing, Liang Tiaoguan
On line damage one positive one is negative, while it is 1.68% that two lines road, which is packaged line loss per unit, is that reasonably, can tentatively judge that there are lines-
Change-table topology is abnormal.
Table 5 totally 16 line loss component information
Table 6 totally 57 line loss component information
The case where analyzing change-table Topology Error first.This group of route is related to 8 power supply users, wherein Beijing Taide and connection
There are the first and second tables for friendship pumping plant, for the two user's points, the line loss after exchanging user's point meter are calculated according to formula (7), to sentence
The disconnected problem anti-with the presence or absence of user's table.Calculated result is as shown in table 7.
7 changes of table-table topological analysis result
It can be seen that by the calculated result of table 7, after exchanging user's meter, totally 16 and totally 57 route line losses are not reasonable.Similarly
Also exchange test has been carried out to distribution transforming, route line loss per unit is also all unreasonable after reduction, and it is different can temporarily to exclude change-table topology appearance
Often, it needs further to carry out it line variable topological analysis.
Fig. 3 is grid structure (also known as power supply topology) schematic diagram of cable power distribution network involved by embodiment.
As shown in the power supply topological diagram of " totally 16 " and " totally 57 " in Fig. 3, wherein solid line is that totally 16 power pack, dotted line are
Totally 57 power pack.
From figure 3, it can be seen that this group of route is related to two monocyclic wiring altogether, wherein totally 16 switch supply objects are big
Building case becomes and rich Lane 476 casees become A altogether.Since totally 16 line losses per unit are negative value, according to table 2, each monocyclic wiring may be deposited
Be type of error 1.Corresponding line loss per unit after topology is corrected is calculated, as a result as shown in table 8.
8 monocyclic wiring topology anomaly analysis result of table
As can be seen from Table 8, the line loss per unit after three kinds of type of error reduction is still unreasonable, and it is super can temporarily to exclude line loss
Mark is caused by monocyclic topology is abnormal.
Unreasonable rationally, separately are counted to 67 groups of packing statistical line losses rates using method described in technical solution of the present invention
Route carry out abnormal identification, can accurately find out existing line-topological abnormal cause of change-table, check result such as 10 institute of table
Show, it can be seen that discrimination method described in the technical program has preferable applicability.
Table 10 checks result
To sum up, since line-change-abnormal table topology is a main cause for causing separated time line loss per unit statistical value unreasonable,
Consider that the equipment amount that part separated time is related to is more, abnormal conditions are complicated simultaneously, only investigation is difficult by scene.
In order to overcome this problem, the technical program is directed to the cable power distribution network mode of connection of monocyclic, is based on separated time line
Loss rate calculation formula analyzes the topological abnormal influence to line loss per unit, has refined corresponding topological Exception Type, has proposed one kind
For line-change-abnormal discrimination method of table topology of the monocyclic cable power distribution network mode of connection.
The implementation of the technical solution ensure that the objectivity of analysis, improves scene investigation efficiency, can verify at the scene
Before, prejudge out abnormal cause.
It invention can be widely used in the line loss monitoring field in Operation of Electric Systems.
Claims (6)
1. a kind of line-change of the monocyclic cable power distribution network mode of connection-abnormal discrimination method of table topology, it is characterized in that:
When carrying out the statistics and calculating of 10kV separated time progress line loss per unit in the work of daily power supply management, monocyclic cable is matched
Power grid, when abnormal conditions occurs in the statistical value of separated time line loss per unit, for the 10kV separated time, according to occurring, line-change-table topology is different
Reason condition is recognized, and then really finds the 10kV separated time line loss per unit statistical value and the reason of abnormal conditions occur；
Specifically, it is as follows to line-change-abnormal identification process of table topology:
Step 1: line loss per unit anomaly analysis being carried out to the route of mutual backup and is existed simultaneously if partial line route loss rate is unreasonable
The case where negative wire is damaged, but it is reasonable to be packaged with line loss per unit, then explanation may the separated time road there is line-change-table topology be abnormal to ask
Topic, goes to step 2；
Step 2: filtering out same the first and second table of user and same power distribution station No. 1 and No. 2 from the electricity of mutual backup route sale of electricity side
The case where distribution transforming table, exchange test is done, if route line loss per unit is reasonable after reduction, then it represents that there may be change-table Topology Errors, deposit
Enter doubtful mistake set；
Step 3: it is split for mutual backup line construction, and combined circuit line loss per unit situation and figure switch state, into
Row electricity reduction test, if route line loss per unit is reasonable after the reduction of certain type of error, then it represents that there may be this mistake, deposits
Doubtful mistake set；
Step 4: carrying out live investigation and defect elimination according to doubtful mistake.
2. line-change of the monocyclic cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the monocyclic cable power distribution network is constituted by pressing bus to draw single back line in difference, wherein switch Kn
For the outlet switch of corresponding line n, switch KmFor the outlet switch of corresponding line m, switch Kr2It is up opening under mode
Circling point.
3. line-change of the monocyclic cable power distribution network mode of connection-abnormal discrimination method of table topology according to claim 2,
It is characterized in that the monocyclic cable power distribution network can be arrived load transfer by Operation switch when any line fault
On another route.
4. line-change of the monocyclic cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that line-the change-table topology abnormal conditions include at least:
1) change-table topology is abnormal；
2) wiring error；
3) scene and PMS figure switch state are inconsistent.
5. line-change of the monocyclic cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the exchange test is carried out according to following calculate:
Wherein, βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i sale of electricity
Side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter；W′P1With W 'P2Respectively
The electricity of corresponding same No. 1 and No. 2 distribution transforming of power distribution station.
6. line-change of the monocyclic cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the calculation formula of the 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i sale of electricity
Side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208392A (en) * | 2020-04-16 | 2020-05-29 | 武汉格蓝若智能技术有限公司 | Label-free cable collection trend identification method |
| CN112688428A (en) * | 2020-12-21 | 2021-04-20 | 国网山东省电力公司枣庄供电公司 | 10kV power grid synchronous line loss treatment method based on Internet of things technology |
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